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authorCraig Gallek <kraig@google.com>2016-02-10 11:50:37 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-01-31 12:06:13 +0100
commitbed42ef5ebbfc046e0440f7e0f941cc07f8ca1e8 (patch)
tree15b46f736f19f18882d1fef04baefb43fe8081d7
parent6c489ab43ccacb9f26620ded90374c582c466344 (diff)
tcp: __tcp_hdrlen() helper
commit d9b3fca27385eafe61c3ca6feab6cb1e7dc77482 upstream. tcp_hdrlen is wasteful if you already have a pointer to struct tcphdr. This splits the size calculation into a helper function that can be used if a struct tcphdr is already available. Signed-off-by: Craig Gallek <kraig@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--include/linux/tcp.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index 318c24612458..2260f92f1492 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -29,9 +29,14 @@ static inline struct tcphdr *tcp_hdr(const struct sk_buff *skb)
return (struct tcphdr *)skb_transport_header(skb);
}
+static inline unsigned int __tcp_hdrlen(const struct tcphdr *th)
+{
+ return th->doff * 4;
+}
+
static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
{
- return tcp_hdr(skb)->doff * 4;
+ return __tcp_hdrlen(tcp_hdr(skb));
}
static inline struct tcphdr *inner_tcp_hdr(const struct sk_buff *skb)